Just thought that I would let anyone whos interested know that if you are removing the viscous fan on a Range Rover P38 V8 the thread is NOT left handed but is a normal right hand thread ie undo as a normal nut.

Watch out for this, serpentine belt V8's spin the fan in the opposite direction to pre-serpentine and diesels. Therefore the thread is normal and more importantly the fan blades are pitched the opposite direction.

I had a real problem with an overheating 3.9 until I found that someone had replaced the fan with a pre-serpentine/diesel one so the fan was blowing out instead of sucking air in through the rad.
BTW the rangie has run for a year now with no fan, depending on the aircon electric fans when it gets hot with no overheating problems since.

Hi, I've a 98 "S" plate 4:6 that I've just stripped the engine on and I could not undo the viscous coupling (I prsumed it was left hand Thread) I took the whole thing to my engine place who cracked it off with a large bar and it was left hand thread.
My question is what is a Serpentine engine? And surely if it spins in the opposite direction the water pump must be diffrent cause it will pump water in wrong direction? The water pump I bought is listed from 1994 to 2001?
I'm not sure if I'm missing something!

Not sure if the year makes a difference, mine is a 1999 and has the later engine. I couldnt get the coupling off and called a small local land rover garage who said that V8's were right handed and it came off first time.